Charles ii



(No Model.)

0. H. WILLGOX.

CONNECTING ROD. No. 398,761. Patented Feb. 26, 1889.

I yea fan rnn States nrnnr rricn.

CHARLES ll. \YILLCOX, OF NEW YORK, Y1, ASSIGXOR TO THE \YIIJLCOX & (ill)in SEYVIXG MACI'IIXE COMPANY, OF SAME PI.;\(E.

CONNECTING-ROD.

SPECIFICATION forming part of Letters Patent No. 898,761, dated February26, 1889.

Application filed November 20, 1888. Serial No. 291,336. (No model.)

To all whom it may concern:

of New York city, in the county and State of New York, have invented anew and useful Improvement in Connection-Rods, which. improvement isfully set-forth in the following specification.

This invention has reference to the con struction of connection-rods forcommunicating motion from a ball-eccentric to a lever or other vibratingpart, and has special, though not exclusive, reference to theconstruction of the connection-rod for a Villcox A: Gibbs sewingmachine,by which motion is commu nicated to the needle arm or lever.

As heretofore constructed, the connectionrod has had on one face acounterbored reoess for the reception of a flange or collar on theband-wheel or pulley adjacent to the ball eccentric, by which theconnection-rod is re ciprocated. Inasmuch as the upper end of theconnection-rod is pivoted to the needle-lever by a ball-stud theconnectiona'od necessarily has a slight oscillating motion on theball-eccentric, this motion being on an axis passing centrally throughthe eccentric transverse to the shaft. In order to allow this slightoscillating movement, it has been necessary to leave a free space allaround the said flange between it and the adjacent face of thecounterbored recess in the connection-rod, which construction alsopermitted the connection-rod to oscillate on an axis passing through theeccentrio and. ball-stud, and to prevent this uncle sirable oscillationwithout interferin with the necessary oscillation on a horizontal axisis the object of the present invention.

Instead of making the face of the counterbored recess a plane surface asheretofore, it has a raised portion. or edge approaching and touching orpractically touching the ad jacent face of the revolving flange. Thisedge is formed on each side of the recess at about the middle thereof,and from this edge the face of the recess is cut away at an angle,

forming a space between it and said flange which gradually increases inwidth in both i directions. Consequently the connection-rod canoscillate slightly upon an axis parallel with this raised edge, but isprevented from oscillating in any other direction.

The invention is not limited in its application to a connection-rodhaving a counterbored recess for the reception of a running flange, butmaybe applied to any connection rod required to oscillate on aball-eccentric, and having either a rotating or a stationary surfaceadjacent to it. In such case the face of the connection-rod on each sideof the eccentric is provided with a raised portion or edge approachingand touching or almost touching the adjacent surface.

In the accompanying drawings, which form part of this specification,Figure I is an elevation, partly in section, of a portion of a \Villcoxd: Gibbs sewing-machine; Fig. 11, a horizontal section of the wheel andconnection-rod; Figs. III, IV, and V, detail views of a portion of thecormection-rod.

A represents the main shaft; a, the balleccentric thereon; B, the wheel;C, the conneetion-rod; D, the needle-lever, and d the ball-studconnecting the connection-rod with the needle-lever.

The wheel B has a flange, b, which projects into a eounterbored recess,0, in the opposing face of the connection-rod. The inner verti cal faceof recess 0, instead of being a plane surf ce, as heretofore, isinclined away from the flange I) both upward and downward from ahorizontal line or edge, e, on each side of the eccentric. This edge orline e touches or nearly touches the rotating flange b, and is parallelwith the axis on-which the connection-rod oscillates; but the contact ofthe edge c with the flange b on bot-h sides of the recess prevents anyvibration or oscillation of the connection-rod 011 a vertical axis.

In practice the highest portion of the edge 0 may be a portion of an arcstruck from the center of the bailed-out recess, as indicated in Fig. V,this point being in the axis upon which the rod 0 oscillates, and therecess is conveniently formed by means of an end mill of the propersize.

It will of course be understood that the invention. is not limited tothe precise machine or construction shown, which is illustrated merelyby way of example.

Having now fully described my said inven tion, whatI claim, and desireto secure byLet ters Patent, is

1. The combination of a shaft, a ball-eccentric thereon, aconnection-rod mounted on said eccentric and adapted to convey motion toa vibratory part, and a partsuch as a fiange having a surface adjacentto said connectionrod, the latter being provided with a raised portionor edge on each side of the eccentric touching or nearly touching saidadjacent part, and being cut away from the surface of said part 011 bothsides of said raised portion or edge, so that said rod can oscillate onsaid eccentric on an axis parallel with said edge, but is prevented fromoscillating in any other direction, substantially as described.

2. The combination of the shaft, ball-eccentric, vibrating lever,connection-rod for con1- municating mot-ion from said eccentric to saidlever and provided with an annular counter- 1 In testimony whereof Ihave signed thisspecification in the presence of two subscribingWitnesses.

CHAS. H. \VILLOOX. Vitn esses:

J. PARMLY, E. A. RAcE.

